阅读说明：本技术 一种切削刀具的制作工艺及刀具 (Manufacturing process of cutting tool and tool ) 是由 尹杰雄 姜鹰 黄秀芬 陈礼仁 张裕禄 罗艳石 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种切削刀具的制作工艺及刀具,其中切削刀具的制造工艺包括以下步骤：将原料放入注射机内,通过加热使原料熔融,通过注射机将原料注射到模具的型腔内得到切削刀具的毛坯件；对切削刀具的烧结治具进行设计和制造,将毛坯件设置在烧结治具上；将毛坯件和烧结治具放到脱脂设备内,通入保护性气体和催化剂后加热,脱除毛坯件内的粘接剂；将脱脂后的毛坯件和烧结治具放入烧结炉中,通入保护性气体进行逐步加热,使毛坯件从疏松状态变成致密状态,得到致密化的切削刀具。通过设置烧结治具,能够保证切削刀具烧结成形的精度,使刀具的各个部位密度均匀,具有良好的耐高温性能,还能提高对刀具的生产效率,便于对切削刀具进行批量生产。(The invention discloses a manufacturing process of a cutting tool and the cutting tool, wherein the manufacturing process of the cutting tool comprises the following steps: putting the raw materials into an injection machine, melting the raw materials by heating, and injecting the raw materials into a cavity of a mold by the injection machine to obtain a blank of the cutting tool; designing and manufacturing a sintering jig of the cutting tool, and arranging a blank on the sintering jig; putting the blank piece and the sintering jig into degreasing equipment, introducing protective gas and a catalyst, and heating to remove the adhesive in the blank piece; and (3) putting the degreased blank and the sintering jig into a sintering furnace, and introducing protective gas to gradually heat the blank so as to change the blank from a loose state to a compact state, thereby obtaining the compact cutting tool. Through setting up the sintering tool, can guarantee the precision that cutting tool sintering takes shape, make each position density of cutter even, have good high temperature resistance, can also improve the production efficiency to the cutter, be convenient for carry out batch production to cutting tool.)

1. A manufacturing process of a cutting tool is characterized by comprising the following steps:

s1: putting raw materials into an injection machine, melting the raw materials by heating, and injecting the raw materials into a cavity of a mold through the injection machine to obtain a blank of a cutting tool;

s2: designing and manufacturing a sintering jig of the cutting tool, and arranging the blank on the sintering jig;

s3, putting the blank and the sintering jig into degreasing equipment, introducing protective gas and a catalyst, and heating to remove the adhesive in the blank;

s4: and putting the degreased blank and the sintering jig into a sintering furnace, and introducing protective gas to gradually heat the blank so as to change the blank from a loose state to a compact state, thereby obtaining the densified cutting tool.

2. The process of claim 1, wherein in step S2, the sintering jig is provided as a supporting plate, the supporting plate includes a bottom plate and a step-shaped supporting seat, and the blade of the blank is placed on the supporting seat.

3. The process of claim 2, wherein said blank is provided with a plurality of said blades, and said support plate is provided with a plurality of said seats, said seats corresponding in number to said blades.

4. The manufacturing process of the cutting tool according to claim 1, wherein the sintering jig is made of a ceramic sheet.

5. The process of claim 1, further comprising, after step S4, the steps of:

s5: polishing and edging the cutting tool.

6. The process of claim 1, wherein in step S1, the temperature of the mold is set to 90 ℃.

7. The process of claim 1, wherein in step S1, the temperatures of the sections of the screw of the injection machine are set to 190 ℃, 195 ℃, 193 ℃ and 186 ℃, respectively, and in step S1, the injection pressures of the sections of the injection machine are set to 95bar, 90bar, 122bar and 62bar, respectively.

8. The process of claim 1, wherein in step S3, the temperatures of the sections in the furnace chamber of the degreasing apparatus are respectively set to 92 ℃, 97 ℃, 102 ℃, 130 ℃, and the acid feeding amounts of the sections in the furnace chamber of the degreasing apparatus are respectively set to 1g/min, 3g/min, and 2 g/min.

9. The process of claim 1, wherein in step S4, the temperature rise rate of the sintering furnace is set to 2 ℃/min, the pressure of the sintering furnace is set to 40KPa, and the maximum temperature of the sintering furnace is set to 1300 ℃.

10. A cutting tool, characterized in that it is manufactured by a process for manufacturing a cutting tool according to any of the claims 1-9.

Technical Field

The invention relates to the field of cutter sintering, in particular to a manufacturing process of a cutting cutter and the cutter.

Background

Powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. Sintering is an important ring in the powder metallurgy process, and in the sintering process, powder particles need to generate physical and chemical processes such as mutual flowing, diffusion, melting, recrystallization and the like, so that a powder body is further densified, and partial or all pores in the powder body are eliminated. For the cutter products with larger precision requirements, the precision requirements cannot be met when the die-casting process is used for production, and the machining process is used for production, so that the high economic cost is required, and the method is not suitable for mass production and manufacturing. However, the powder body is further dense in the sintering process of the powder metallurgy process, so that the powder body tends to shrink in volume in the sintering process, and for a cutter product with higher precision requirement, when the powder body shrinks and becomes small in the sintering process, the cutter is deformed or even broken under the influence of gravity, the precision of the cutter is influenced, and the production of the cutter is not facilitated.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a manufacturing process of the cutting tool, which can ensure the precision of the cutting tool and is beneficial to batch production.

The invention also provides a cutter prepared by the sintering process of the cutting cutter.

According to the manufacturing process of the cutting tool in the embodiment of the first aspect of the invention, the method comprises the following steps:

s1: putting raw materials into an injection machine, melting the raw materials by heating, and injecting the raw materials into a cavity of a mold through the injection machine to obtain a blank of a cutting tool;

s2: designing and manufacturing a sintering jig of the cutting tool, and arranging the blank on the sintering jig;

s3, putting the blank and the sintering jig into degreasing equipment, introducing protective gas and a catalyst, and heating to remove the adhesive in the blank;

s4: and putting the degreased blank and the sintering jig into a sintering furnace, and introducing protective gas to gradually heat the blank so as to change the blank from a loose state to a compact state, thereby obtaining the densified cutting tool.

The manufacturing process of the cutting tool according to the embodiment of the first aspect of the invention has at least the following beneficial effects: according to the invention, the injection machine is used for obtaining the blank of the cutting tool, the sintering jig is designed and manufactured, the blank of the cutting tool is placed on the sintering jig, the blank and the sintering jig are degreased and sintered together, the blank is sintered compactly under the support of the sintering jig, when the shrinkage of the blank is reduced in the sintering process, the shrinkage motion of the blank is carried out on the sintering jig, the sintering jig can support the blank, the blank is prevented from deforming under the action of gravity, and the precision of the process of forming the cutting tool by compacting the blank can be maintained. According to the manufacturing process of the cutting tool, the sintering jig is arranged, the problem that the cutting tool deforms in the sintering process can be solved, the sintering forming precision of the cutting tool is guaranteed, the density of each part of the cutting tool is uniform, and the cutting tool has good high-temperature resistance.

According to some embodiments of the present invention, in the step S2, the sintering jig is provided as a supporting plate, the supporting plate includes a bottom plate and a supporting seat having a step shape, and the blade of the blank is placed on the supporting seat.

According to some embodiments of the invention, the blank is provided with a number of said blades, and the support plate is provided with a number of said seats corresponding to the number of said blades.

According to some embodiments of the invention, the sintering jig is made of a ceramic sheet.

According to some embodiments of the invention, after step S4, further comprising step S5: polishing and edging the cutting tool.

According to some embodiments of the invention, in the step S1, the temperature of the mold is set to 90 ℃.

According to some embodiments of the invention, in the step S1, the temperatures of the screw sections of the injection machine are set to 190 ℃, 195 ℃, 193 ℃, 186 ℃, respectively.

According to some embodiments of the invention, in the step S1, the injection pressures of the sections of the injection machine are respectively set to 95bar, 90bar, 122bar and 62 bar.

According to some embodiments of the invention, in the step S3, the temperatures of the sections in the furnace chamber of the degreasing apparatus are respectively set to 92 ℃, 97 ℃, 102 ℃ and 130 ℃, and the acid feeding amounts of the sections in the furnace chamber of the degreasing apparatus are respectively set to 1g/min, 3g/min and 2 g/min.

According to some embodiments of the present invention, in the step S4, the temperature increase rate of the sintering furnace is set to 2 ℃/min, the pressure of the sintering furnace is set to 40KPa, and the maximum temperature of the sintering furnace is set to 1300 ℃.

According to a second aspect of the present invention, a cutting tool is provided, which is manufactured by the manufacturing process of the cutting tool according to the first aspect.

According to the second aspect of the invention, the tool has at least the following advantages:

according to the cutter provided by the embodiment of the second aspect of the invention, the cutter is prepared by using the manufacturing process of the cutting cutter provided by the embodiment of the first aspect, and the sintering jig is arranged to support the blank of the cutter, so that the precision of the cutter after sintering and compacting can be ensured, the density of each part of the cutter is uniform, the cutter has good high-temperature resistance, and the production efficiency of the cutter can be improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a flow chart of a process for making a cutting tool according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sintering jig of a cutting tool manufacturing process according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a sintering jig for a cutting tool manufacturing process according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a sintering jig in a manufacturing process of a cutting tool according to another embodiment of the present invention.

Reference numerals:

a bottom plate 100, a first supporting portion 210, and a second supporting portion 220.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to the orientation description, such as the upper, lower, front, rear, left, right, inner, outer, etc., is the orientation or positional relationship shown on the drawings, only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly defined, terms such as set, mounted, connected, assembled, matched and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present invention by combining the specific contents of the technical solutions.

A process of manufacturing a cutting tool according to an embodiment of the present invention will be described with reference to fig. 1 to 4.

Example one

The manufacturing process of the cutting tool provided by the embodiment of the invention comprises the following steps:

s1: and (3) putting the raw materials into an injection machine, heating to melt the raw materials, and injecting the raw materials into a cavity of a mold through the injection machine to obtain a blank of the cutting tool. The metal powder and the organic binder are uniformly mixed together to obtain the raw material injected into the injection machine. In the injection molding process, raw materials are heated in a barrel of an injection machine to form a plastic material with rheological property, and the plastic material is injected into a mold under proper injection pressure to mold a blank piece. Specifically, in step S1, the temperature of the mold is set to 90 ℃, the temperatures of the sections of the screw of the injection machine are set to 190 ℃, 195 ℃, 193 ℃ and 186 ℃, respectively, and the injection pressures of the sections of the injection machine are set to 95bar, 90bar, 122bar and 62bar, respectively.

S2: designing and manufacturing a sintering jig of the cutting tool, and arranging a blank on the sintering jig. Specifically, the sintering jig is provided as a support plate. Referring to fig. 2 to 4, in some embodiments, the support plate includes a bottom plate 100 and a support seat in a stepped shape, the support seat includes a first support portion 210 and a second support portion 220, the height of the first support portion 210 is higher than that of the second support portion 220 with respect to the bottom plate 100, the first support portion 210 and the second support portion 220 cooperate to form a step for supporting a blade of a tool, when a blank of the tool shrinks and becomes small in a sintering process, the shrinking motion of the blade of the tool is performed on the support seat, the support seat can support the blade of the blank, deformation of the tool in the sintering process is avoided, and a height difference between the first support portion 210 and the second support portion 220 can also avoid the support seat from abutting against the blade to cause the blade to warp, so as to ensure accuracy of the tool.

Specifically, the blades of the blank are placed on the supporting seats, the blank is provided with a plurality of blades, the supporting plate is provided with a plurality of supporting seats, and the number of the supporting seats corresponds to the number of the blades. The support plate includes a base plate 100 and a support seat including a first support portion 210 and a second support portion 220, the first support portion 210 and the second support portion 220 being disposed on the base plate 100, a height of the first support portion 210 being higher than a height of the second support portion 220 with respect to the base plate 100. The blank is placed on bottom plate 100, the blade of blank is placed on the supporting seat, because the height that highly is higher than second supporting part 220 of first supporting part 210, first supporting part 210 cooperates with second supporting part 220 and forms the ladder that supports the blank blade, when the blank is when the shrink diminishing in sintering process, the shrink motion of blade is gone on the supporting seat, the supporting seat can support the blank, avoid the blank downward bending deformation under the action of gravity, the difference in height between first supporting part 210 and the second supporting part 220 can also prevent that the blade from upwarping at shrink in-process, precision when guaranteeing the blank shaping. In some embodiments, the first support portion 210 is disposed outside the second support portion 220 with reference to the center of the base plate 100, the first support portion 210 has a height higher than that of the second support portion 220, the blade of the blank is placed on the first support portion 210, the blade moves from the first support portion 210 to the second support portion 220 when the blade shrinks and becomes smaller during the sintering process, and the first support portion 210 and the second support portion 220 support the blade to prevent the blade from bending and deforming downward under the influence of gravity during the shrinking process and affecting the quality of the cutting tool.

And S3, putting the blank piece and the sintering jig into degreasing equipment, introducing protective gas and a catalyst, and heating to remove the adhesive in the blank piece. In the degreasing process, the adhesive is gradually discharged from different parts of the blank along the micro channels among the particles, the blank is embrittled due to strength reduction after the adhesive is discharged, and a sintering jig is arranged below the blank, so that the blank can be supported, the blank is protected, and the catalytic blank is prevented from being broken. Specifically, in some embodiments, the temperature of each section of the furnace chamber of the degreasing device is respectively set to 92 ℃, 97 ℃, 102 ℃ and 130 ℃, and the acid feeding amount of each section of the furnace chamber of the degreasing device is respectively set to 1g/min, 3g/min and 2 g/min.

S4: and (3) putting the degreased blank and the sintering jig into a sintering furnace, and introducing protective gas to gradually heat the blank so as to change the blank from a loose state to a compact state, thereby obtaining the compact cutting tool. Specifically, the temperature rise rate of the sintering furnace was set to 2 ℃/min, the pressure of the sintering furnace was set to 40KPa, and the maximum temperature of the sintering furnace was set to 1300 ℃.

According to the invention, the injection machine is used for obtaining the blank of the cutting tool, the sintering jig is designed and manufactured, the blank of the cutting tool is placed on the sintering jig, the blank and the sintering jig are degreased and sintered together, the blank is sintered compactly under the support of the sintering jig, when the shrinkage of the blank is reduced in the sintering process, the shrinkage motion of the blank is carried out on the sintering jig, the sintering jig can support the blank, the blank is prevented from deforming under the action of gravity, and the precision of the process of forming the cutting tool by compacting the blank can be maintained. According to the manufacturing process of the cutting tool, the sintering jig is arranged, the problem that the cutting tool deforms in the sintering process can be solved, the sintering forming precision of the cutting tool is guaranteed, the density of each part of the cutting tool is uniform, and the cutting tool has good high-temperature resistance.

It is understood that in some embodiments, before step S1, designing and manufacturing the mold is further included. The mould is used for receiving raw materials, the raw materials are heated into plastic materials with rheological property in a charging barrel of the injection machine, and the plastic materials are injected into the mould under proper injection pressure to form a blank piece, and the injection moulding of the blank piece is completed.

In addition, in some embodiments, after the step S4, a step S5 is further included: the cutting tool is polished and edged. And after the blank piece becomes a compact state, polishing the cutting tool to ensure that the surface of the cutting tool is bright and flat. And (4) edging the cutting tool, so that the cutting tool can perform cutting work, and a finished cutting tool which can be normally used is obtained.

Referring to fig. 2 to 4, in some embodiments, the supporting seats are provided in at least two, and at least two supporting seats are oppositely provided on the bottom plate 100. Specifically, referring to fig. 2, in some embodiments, two supporting seats are provided, the two supporting seats are respectively provided at a pair of opposite corners of the bottom plate 100, the supporting seats are provided at the opposite corners, and the area of the supporting seats is small, so that the processing amount of the supporting plate can be reduced, and the production efficiency and the cost can be saved. It can be understood that, referring to fig. 3, in some embodiments, two supporting seats are provided, and two supporting seats are respectively provided at two sides of the bottom plate 100, and support the blade of the cutter at two sides, so as to prevent the blade from deforming when being retracted, and ensure the precision of the cutter.

In addition, referring to fig. 4, in some embodiments, the first support part 210 is provided as a first ring disposed around the base plate 100, and the second support part 220 is provided as a second ring disposed around the base plate 100, the second ring being disposed inside the first ring. The height of the first support part 210 is higher than that of the second support part 220, the blade is placed on the first support part 210, and the blade can be, it can be understood that, when the cutter has a plurality of blades in different directions, the first support part 210 and the second support part 220 are arranged in a circular ring shape, and the circular ring-shaped first support part 210 and the circular ring-shaped second support part 220 can support the blades in different directions, thereby ensuring the precision of the blade.

In some embodiments, the first support 210 is integrally formed with the base plate 100. The first supporting part 210 and the bottom plate 100 which are integrally formed do not need to be processed for the second time, so that the integrated die has the advantages of high precision and high material utilization rate, and can reduce the processing procedures and improve the production efficiency.

In some embodiments, the second supporting portion 220 is integrally formed with the base plate 100. The second supporting portion 220 and the bottom plate 100 which are integrally formed do not need to be processed for the second time, so that the integrated die has the advantages of high precision and high material utilization rate, machining procedures can be reduced, and production efficiency is improved.

In some embodiments, the first support portion 210 is integrally formed with the second support portion 220. The first supporting portion 210 and the second supporting portion 220 are integrally formed, so that the first supporting portion 210 and the second supporting portion 220 are tightly connected, and the blade can move from the first supporting portion 210 to the second supporting portion 220. First supporting part 210 and second supporting part 220 of integrated into one piece need not to process through the secondary operation, have the advantage that the precision is high, material utilization is high, can also reduce manufacturing procedure, improves production efficiency.

In some embodiments, the first support part 210 is movably disposed on the base plate 100. First supporting part 210 movably sets up on bottom plate 100, can adjust the position of first supporting part 210, is convenient for change first supporting part 210, makes the backup pad adapt to the cutter of different length and size, improves the commonality of backup pad.

In some embodiments, the second supporting portion 220 is movably disposed on the bottom plate 100. The second supporting portion 220 is movably arranged on the bottom plate 100, the position of the second supporting portion 220 can be adjusted, the second supporting portion 220 is convenient to replace, the supporting plate is made to adapt to cutters with different lengths and sizes, and the universality of the supporting plate is improved.

According to a second aspect of the present invention, a cutting tool is manufactured by the manufacturing process of the cutting tool of the first aspect. According to the cutter provided by the embodiment of the second aspect of the invention, the cutter is prepared by using the manufacturing process of the cutting cutter provided by the embodiment of the first aspect, and the sintering jig is arranged to support the blank of the cutter, so that the precision of the cutter after sintering and compacting can be ensured, the density of each part of the cutter is uniform, the cutter has good high-temperature resistance, and the production efficiency of the cutter can be improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.